Green synthesis of amphipathic graphene aerogel constructed by using the framework of polymer-surfactant complex for water remediation

Cao, Jingjing; Wang, Ziyuan; Yang, Xianhou; Tu, Jing; Wu, Ronglan; Wang, Wei

doi:10.1016/j.apsusc.2018.02.282

Cited by 35 publications

(10 citation statements)

References 50 publications

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“…As shown in Figure a–c,f, rGOA exhibits a typical porous structure with the pore dimension of tens of micrometers, which is similar to some previous works . For GA and gGA samples, it can be seen that after high‐temperature reduction the 3D structure remained integral and unchanged (Figure S1a–c, Supporting Information).…”

supporting

confidence: 86%

3D Thermally Cross‐Linked Graphene Aerogel–Enhanced Silicone Rubber Elastomer as Thermal Interface Material

Zhang

Kong

Tao

et al. 2019

Adv Materials Inter

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supporting

confidence: 86%

3D Thermally Cross‐Linked Graphene Aerogel–Enhanced Silicone Rubber Elastomer as Thermal Interface Material

Zhang

Kong

Tao

et al. 2019

Adv Materials Inter

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“…Then, the mixture was transferred to a 100 mL autoclave, which was heated up to 180°C for 24 h, then washed the product with water and ethanol to remove impurities, then dried the composite, and annealed in a muffle furnace at 500°C for 4 h, and white TiO 2 powder was obtained. Graphene oxide (GO) was prepared by the same method as that in the reference (Cao et al 2018). The calculated concentration of GO is 5 mg mL −1 .…”

Section: Preparation Of Go and Tio 2 Nrsmentioning

confidence: 99%

Photocatalytic TiO2/rGO/CuO Composite for Wastewater Treatment of Cr(VI) Under Visible Light

Wang

Zhang

Mei

et al. 2020

Water Air Soil Pollut

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The harm of chromium pollution to the environment has caused a widespread concern; hexavalent chromium is a toxic, cancerogenic, and genetically mutagenic contaminant to the human body; by contrast, trivalent chromium is almost non-toxic to the human body; therefore, it is a feasible method to reduce hexavalent chromium to trivalent chromium. Photocatalysis is a new environmentally friendly and harmless technology, which can transform pollutants into non-toxic or less toxic products. In this study, we synthesized TiO 2 /rGO/CuO ternary nanocomposites to treat hexavalent chromium pollution under visible light. Under optimal conditions, the photoreduction efficiency of 100 ppm hexavalent chromium solution could reach 100% in 80 min. The photoreduction rate of hexavalent chromium is 29.4 times than that of pure TiO 2. The photocatalytic property of CuO in TG2C8 nanocomposites is attributed to accelerate the separation of electrons and holes and the efficient electron transfer through the rGO framework. We believe that TiO 2 /rGO/CuO composites have great potential in wastewater treatment. Keywords Wastewater treatment. TiO 2 nanorods. CuO nanoparticles. Photocatalysis. Visible light irradiation 1 Introduction The rapid growth of the battery industry, ceramics, mining, and global plastic production causes pollution of all kinds of heavy metals (Cr, Sb, Au, Ag, Hg, Pb, etc.) which threatens the environment and human health (Zhan et al. 2018; Wang et al., 2018a; Li et al. 2018). Chromium pollution, due to mining, electroplating, pigment production, wood preservation, tanning, and metallurgy, has become a key issue in aquatic ecosystems (Jiang et al. 2019; Guan, et al. 2019; Rahmat et al. 2020). Chromium exists mainly in water in two valence states: hexavalent chromium (Cr(VI)) and trivalent chromium (Cr(III)). By contrast, Cr(VI) is a toxic, cancerogenic, and mutagenic contaminant to creatures (Lyu et al. 2019; Yuan et al. 2019a; Wang et al. 2019). The US Environmental Protection Agency stipulates that the maximum concentration of Cr(VI) in surface water is 0.1 ppm and drinking water is 0.05 ppm (Lyu et al. 2019; Qiu et al. 2015). Compared with Cr(VI), Cr(III) is almost non-toxic and is a vital micronutrient for the human body. Cr(III) is easily chelated by natural clay or converted to Cr(OH) 3 and precipitated from water (Ksp(Cr(OH) 3) = 6.3 × 10 −31) (Barrera-Diaz et al. 2012; Zhang et al. 2014; Zhang et al. 2018; Wang et al. 2018b). Therefore, it is a

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“…The chemical modification of cellulose is not restricted to increasing its adsorption capacity, and imparting cellulose with new properties is also desirable. Examples of such properties include selective adsorption (Cao et al 2018;Liu et al 2015), bi-functionality (Gericke et al 2013;Peydayesh et al 2020Ronglan Wu et al 2015, and photo-degradability (Belhouchet et al 2019;Li et al 2020;Mei et al 2019;Wu et al 2015;Xiaolin Man et al 2015).…”

Section: Introductionmentioning

confidence: 99%

DMAEMA-grafted cellulose as an imprinted adsorbent for the selective adsorption of 4-nitrophenol

Lang

Shi

et al. 2021

Cellulose

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4-Nitrophenol is a highly toxic environmental pollutant. It is a challenge to selectively remove it from a mixture of various pollutants. Herein, we report a study on the selective adsorption of 4-nitrophenol by using molecularly imprinted polymers (MIPs). The imprinted polymer was synthesized using cellulose as a framework, onto which, the complex of the imprinting molecule (i.e., 4-nitrophenol) and a candidate material [namely, 2-(dimethylamino)ethyl methacrylate. DMAEMA] was grafted. The obtained MIP showed an excellent adsorption capacity with good selectivity. Also, the adsorption of 4-nitrophenol by the obtained MIP was fast and the adsorbent exhibited good recyclability. The thermodynamics and kinetics of the adsorption process of 4-nitrophenol by MIP was thoroughly studied, where an otherwise-equivalent non-imprinted polymer was used as a control in the experiments. The selectivity of the MIP adsorbent for 4-niteophenol was evaluated by two types of experiments: (1) adsorption experiments in single-component adsorbate systems (containing 4-nitrophenol, 3-nitrophenol, catechol, or hydroquinone), and (2) competitive adsorption experiments in binary adsorbate systems (containing 4-nitrophenol plus either 3-nitrophenol, catechol or hydroquinone). The selectivity coefficient for 4-nitrophenols was twice of those of other phenols (that were all around 2), indicative of the extent of the affinity of MIPs to these phenolic compounds. The recyclability of the adsorbent was evaluated for 5 adsorption–desorption cycles, where the adsorption capacity of the last cycle remained over 90.2% of that of the first cycle. Graphic Abstract

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Green synthesis of amphipathic graphene aerogel constructed by using the framework of polymer-surfactant complex for water remediation

Cited by 35 publications

References 50 publications

3D Thermally Cross‐Linked Graphene Aerogel–Enhanced Silicone Rubber Elastomer as Thermal Interface Material

3D Thermally Cross‐Linked Graphene Aerogel–Enhanced Silicone Rubber Elastomer as Thermal Interface Material

Photocatalytic TiO2/rGO/CuO Composite for Wastewater Treatment of Cr(VI) Under Visible Light

DMAEMA-grafted cellulose as an imprinted adsorbent for the selective adsorption of 4-nitrophenol

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